Regular expressionsAnchors String Start and End $ →Backreferences in Pattern N and K<name> →Capturing Groups →Catastrophic Backtracking →Character Classes →Escaping, Special Characters →Greedy and Lazy Quantifiers →JavaScript Alternation (OR) →Lookahead and Lookbehind →Methods of RegExp and String →Multiline Mode of Anchors $, Flag M →Patterns and Flags →Quantifiers +, *, ? and {N} →Sets and Ranges [...] →Sticky Flag Y, Searching at Position →Unicode Flag U and Class P{...} →Word Boundary B →